Power take-off device



P 8, 1948. J. H. BURRELL arm. 2,450,080

POWER TAKE OFF DEVICE Filed Sept. 26, 1947 1 1 3 Sheets-Sheet 1 IZ1Z3urrell' N Blfifiicke mv TNT as,

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ATIORNEYS p 23, 1948- J. H. BURRELL :rm. 2,450,080

POWER TAKE OFF DEVICE Filed Sept. 26, 1947 3 Sheets-Sheet 2 J jiiflzzrreZZ INVENTORB,

ATTORNEYS p 1948. H. BURRELL arm. ,450,080

POWER TAKE OFF DEVICE Filed Sept. 26, 1947 3 Sheets-Sheet 3 J22. Erna ZZRicke y mm 0R8,

ATTORNEYS.

Patented Sept. 28, 1948 POWER TAKE-OFF DEVICE James H. Burrcll and PaulE. Rickey, Rocky Ford, 0010.

Application September 20, 1941, Serial No. 776,344

4 Claims. 1

This invention relate to power take-of! devices designed primarily as ameans for taking oil power from tractors.

In known tractor take-off mechanisms, it is necessary to cut off thepower to the machine receiving power from the tractor, when the tractoris not in motion. It is, therefore, :theprimary object of the presentinvention to provide means to supply power to farm machinerycontinuously, whether the tractor supplying the power is in motion ornot.

Another important objectof the invention is to provide a power take-oi!coupled with the front end of the engine, delivering the Power at therear end of the engine for operating the mech-- anism associatedtherewith.

With the foregoing and other objects in view which will appear as thedescription proceeds,

the invention consists of certain novel details of construction andcombinations of parts, hereinafter more fully described and pointed outin the claims, it being understood that changes may be made in theconstruction and arrangement of parts without departing from the spiritof the invention as claimed.

- Referring to the drawings:

Figure 1 is an elevational view illustrating a' Figure 5 is an enlargedfragmental elevational view illustrating the coupling at one end of thepower take-off mechanism.

sure 61s a sectional view takenon line H of Figure 1. Y

Figure '7 is a sectional view taken on line 1-1 of Figure 6.

Referring to the drawings in detail, the reference character 5 indicatesthe forward end of the crank shaft of the tractor, the shaft beingusually supplied with the cranking handle, not shown.

Secured to the forward end of the crank shaft 5 are pulleys 6 which areof the V-groove type, to'accommodate the V-belts 'I that operate overthe substantially large pulleys 8, which are secured to the power shaft9 of the power take-of! mechanism.

The power shaft 8 is encased in the tubular housing It that extends thefull length of the 2 Jacent to the pulley 8, while the rear end thereofextends beyond the rear of the tractor, as clearly shown by Figure 1.,The reference character I 1 indicates a bracket which is formed withthe bearing I! at its upper end, in which the shaft 6 rotates, the lowerend of the bracket ii being connected with the housing It, supportingthe forward end of the housing. Secured to the housing 10 is a circularhousing 14 to which the arms ill of the bracket l6 are welded, thebracket it having a right-angled end ll fitted in an opening of themember 18 which is bolted to the tractor. the end ll of the bracket 16being square to fit within the square opening of the member l8, where itis held in place by mean of the set screw 19. The housing 14 is providedwith a disc 20 that operates therein, the disc 20 being formed with anopening through which the housing i0 extends, the opening beingeccentrically formed within the disc, so that when the disc is rotatedwithin the housing, the shaft 9 will be moved vertically to the end thatthe pulleys 8 at the ends thereof will be moved slightly to either causeslack in the belts I so that there will be slippage between the beltsand pulleys, or tightened so that the belts will tightly engage thepulleys, transmitting movement from the shaft 5 to the shaft 9.

The operation of the tubular-housing to accomplish this result, iscarried out by means of the lever 2|, which is shown as secured to thehousing l0 adjacent to the take-ofl end of the power shaft 9.

The housing I 0 operates in an opening formed in the bracket 22, whichis bolted to the bar 23 of the tractor frame.

The bracket 22 has an inwardly extended flange 24 formed with notches 25that accommodate the lever 21 to hold the lever in its positions ofadjustment. A coiled spring indicated by the reference character 26 hasone of its ends connected to the bracket 22, while the opposite endthereof connects with the lever ii to normally pull the lever 2| in onedirection to secure it in its positions of adjustment. On one end of thepower shaft 9 is a coupling 21 which may be connected with any suitablemechanism to be operated by the device.

From the foregoing it will be seen that due to the construction shownand described, I have provided means whereby the power shaft 9 may bereadily and easily clutched or unclutched with respect to the crankshaft 5, either while the tractor is stationary, or while the tractor istractor, the front end extending to a point admoving.

Having thus described the invention, what is claimed is:

1. The combination with the crank shaft of a tractor, of a powertake-oi! comprising pulleys secured to the crank shaft. a tubular powershaft housing mounted on the tractor. a power shaft mounted within thetubular shaft housing, pulleys on the power shaft, belts operating overthe pulleys of the crank shaft, transmitting m ment of the crank shaftto the power shaft, a support for the tubular power shaft housing,comprising a circular housing, a bracket to which the circular housingis secured, the bracket being secured to the tractor, a disceccentrically secured to the power shaft housing. fitted within thecircular housing, and means for rotating the tubular power shaft housingand disc within the circular housing, whereby the pulleys of the powershaft are moved towards or away from the pulleys of the crank shaft,loosening or tightening the belts, and regulating the operation of thepower shaft.

2. The combination with the crank shaft of a tractor, of a powertake-oi! comprising pulleys secured to the crank shaft, a tubular powershaft housing mounted for pivotal, movement on the tractor and extendingfromthe front end of the tractor to the rear end thereof, a power shaftmounted within the power shaft housin pulleys on the power shaft, beltsmoving over the pulleys, transmitting movement from the crank shaft tothe power shaft, and-means for moving the tubular shaft housing andpower shaft supported therein. towards or away from the crank shaft,regulating the tension on the belts, controlling the operation of thepower shaft.

3. The combination with the crank shaft of a tractor, of a powertake-ofi comprising pulleys secured to the crank shaft, a tubular powershaft housing mounted on the tractor, directly under the tractor, apower shaft mounted within the tubular housing, pulleys mounted on thepower shaft, belts operating over the pulleys transmitting movement ofthe crank shaft to the power shaft, a lever connected with the powershaft housing by means of which the tubular shaft housing is rotated, a.circular bracket in which the tubular shaft housing is eccentricallymounted, whereby rotary movement of the power shaft housing moves thepulleys of the power shaft towards or away from the pulleys of the crankshaft, tightening or loosening the belts, controlling the rotation ofthe pulleys and power shaft.

4. The combination with the crank shaft of a tractor, of a powertake-off comprising pulleys secured to the crank shaft, a tubular powershaft housing mounted on the tractor, a power shaft operating within thetubular power shaft housing, pulleys secured to the forward end of thepower shaft, belts operating over the pulleys, the rear end of the powershaft extending beyond the rear end of the tractor, means for moving theforward end of the power shaft towards or away from the crank shaft,regulating the tension on the belts, whereby the operation of the powershaft is regulated.

JAMES H. BURRELL. PAUL E. RICHEY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,323,490 Putnam Dec. 2, 19192,140,687 Brown Dec. 20, 1938

